Inbreeding coefficients from the surnames of grandparents of the schoolchildren in Albanian-speaking Italian villages

Data on grandparental surnames were obtained from children in 45 Italo-Albanesi villages in nine provinces of southern Italy and Sicily. Concordance of surnames (isonymy) and inbreedding by village were estimated for each province and on the total sample. Total mean isonymy is 0.0251. The weighted mean inbreeding coefficient, and its random and non-random components are 0.0063, 0.0024 and 0.0039, respectively. Isonymy values are similar to those of rural Italian villages except that Alpine and some Appennine villages appear to be more isolated and inbred.